The prereleases came out a while ago on labs.adobe.com, but now the official versions of Lightroom 3.5 and Camera Raw 6.5 are out.  If you have Lightroom and/or Photoshop set to automatically check for updates, they will prompt you next time you open Lightroom 3 or Photoshop CS5. Otherwise, in your software go to Help>Check for Updates.  These include new camera support, new lens profiles, and bug fixes.

If you have Lightroom 2 or earlier, and/or Photoshop CS4 or earlier and are looking for support for the new cameras listed, you should instead read this post on converting to DNG.

Details, from Adobe Product Manager Tom Hogarty:

New Camera Support

Fuji FinePix F600EXR
Hasselblad H4D-60
Leaf Aptus II 12
Leaf Aptus II 12R
Nikon Coolpix P7100
Olympus E-P3
Olympus E-PL3
Olympus E-PM1
Panasonic DMC-FZ150
Panasonic DMC-G3
Panasonic DMC-GF3
Pentax Q
Phase One  IQ140
Phase One  IQ160
Phase One  IQ180
Phase One  P40+
Phase One  P65+
Ricoh GXR MOUNT A12
Sony Alpha NEX-C3
Sony Alpha NEX-5N
Sony SLT-A35
Sony SLT-A65
Sony SLT-A77
Hasselblad “FFF” files created by the Hasselblad Phocus software for currently supported models are also now supported. (FFF files created using the FlexColor software are not supported)

New Lens Profile Support

Lens Mount     Lens Name
Canon  Canon EF 14mm f/2.8 L USM
Canon  SIGMA APO 120-300mm F2.8 EX DG OS HSM
Hasselblad       Hasselblad HC 2.2/100
Hasselblad       Hasselblad HC 2.8/80
Hasselblad       Hasselblad HC 3.2/150
Hasselblad       Hasselblad HC 3.2/150N
Hasselblad       Hasselblad HC 3.5/35
Hasselblad       Hasselblad HC 3.5/50-II
Hasselblad       Hasselblad HC 3.5/50
Hasselblad       Hasselblad HC 3.5-4.5/50-110
Hasselblad       Hasselblad HC 4/210
Hasselblad       Hasselblad HC 4.5/300
Hasselblad       Hasselblad HC Macro 4/120-II
Hasselblad       Hasselblad HC Macro 4/120
Hasselblad       Hasselblad HCD 4/28
Hasselblad       Hasselblad HCD 4-5.6/35-90
Nikon  Nikon AF Zoom-Nikkor 80-200mm f/2.8D ED
Nikon  Nikon AF-S NIKKOR 24mm f/1.4G ED
Nikon  Nikon AF-S NIKKOR 35mm f/1.4G
Nikon  Nikon AF-S NIKKOR 50mm f/1.8G
Nikon  SIGMA APO 120-300mm F2.8 EX DG OS HSM
Pentax PENTAX 01 Standard Prime
Pentax PENTAX 02 Standard Zoom
Pentax SIGMA 85mm F1.4 EX DG HSM
Sony    SIGMA 85mm F1.4 EX DG HSM
Sony    TAMRON 18-270mm F/3.5-6.3 Di II PZD B008S
Sony    TAMRON SP 70-300mm F/4-5.6 Di USD A005S

Lightroom 3.5 Bugs – Fixed

Using the arrow keys to modify image adjustment settings lacked responsiveness
A Publish Collection targeting a hard drive on Windows would not behave properly if the designated folder was deleted from hard drive
After editing the capture time in Lightroom, “Date Time Digitized” was incorrectly changed. (Only “Date Time Original” should be modified)
On Windows computers, Lightroom would interpret the wrong time zone per the following customer report: http://feedback.photoshop.com/photoshop_family/topics/xmp_metadatadate_has_wrong_time_zone
Changing Lightroom’s date created field to a date prior to 1933 resulted in unexpected values
Lightroom 3.2 introduced preview cache inefficiencies
GPS Altitude metadata was incorrectly excluded from files converted to DNG or exported as DNG files from Lightroom 3.4.1
For non-English language operating systems, folder names in the import dialog may not have been translating properly
When exporting images with the “Write Keywords as Lightroom Hierarchy” enabled, keywords with “Include on Export” deselected would still have been included on export
Saving metadata to a JPEG file in Lightroom 3.4 could have caused Lightroom to quit unexpectedly
A Publish Collection in Lightroom 3.4 set to publish original files would fail to include XMP files for proprietary raw formats.
RECONYX images did not open properly in Lightroom 3.4
When applying automatic lens profile correction, Lightroom 3.4 did not automatically recognize the following lens:  “Nikon AF-S NIKKOR 24mm f/1.4G ED”
Using the plus or minus key to increment Develop Module parameters did not work properly on the Mac
The Limit File Size export option was incorrectly including EXIF metadata on export when the Minimize Embedded Metadata option was selected
On Mac OS X 10.7, the Lightroom import dialog did not properly display network volumes
On Windows computers, using Shift + Scroll wheel to adjust the Adjustment Brush feather size, the expected result of the scroll wheel movement was reversed per the following feedback post
Lightroom would not provide the correct error message when attempting to delete photos published to Facebook
Lightroom would experience tether capture failures on computers utilizing OS X 10.6.8 and 10.7
Develop load time performance was inconsistent
Camera Raw 6.5 Release Notes
These items have been FIXED in Camera Raw 6.5:

Camera Raw did not allow write-back capability for the EXIF GPS properties.
The DNG File format did not support XMP Media Management.
A JPEG file with a specific characteristic was found to have a pink cast.
The undo command (Command+z) was failing to undo crop adjustments.
Single images marked for deletion were not moved to the trash.
A magenta color cast could have appeared on Nikon D7000 or Pentax K-5 images if the multi-exposure feature was used with raw capture.
Applying Sigma 10-20mm Lens Profile to Nikon D7000 raw files could have produced dark or black corners
Some EXIF fields of Panasonic raw files appeared to be blank in Bridge Metadata panel
Applying the exposure adjustment brush to a high ISO image could have caused excessive noise reduction correction to the entire image
Known Issues

Customers on the Mac platform utilizing OS X 10.7 will no longer have tethered support in Lightroom 3 for the following Canon cameras:

EOS 5D
EOS 350D (Rebel XT/EOS Kiss Digital N)
EOS 20D